Linkplay Wireless Smart Audio Module (A88) User Manual Rev 1.5 Apr. 02 2018 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 HISTORY Version Date Description 2017/04/14 2017/08/18 2017/09/05 2017/12/04 2018/03/05 2018/04/02 Specification release Update new version dimensions and features Update RF parameters Update operating temperature range Add plug PCB and NGFF connector dimensions Add key components list 1.0 1.1 1.2 1.3 1.4 1.5 Document No.: WMB20170414 Page 2 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 INDEX 1. 2. Overview ..................................................................................................................................................... 4 1.1. Key Components List .............................................................................................................................. 4 Parameter ................................................................................................................................................. 5 1.2. Hardware Description ............................................................................................................................... 9 2.1. Description of Hardware Interface .......................................................................................................... 9 2.2. Mechanical Dimension .......................................................................................................................... 11 External Antenna ................................................................................................................................... 13 2.3. Typical Application ................................................................................................................................ 14 2.4. 2.5. Power on Sequence ................................................................................................................................ 16 USB OTG Port ....................................................................................................................................... 16 2.6 3. Software Introduction ...................................................................................................................................... 17 3.1. Feature list .................................................................................................................................................. 17 3.2. APP support ................................................................................................................................................ 17 3.3. Certifications............................................................................................................................................... 18 4. Module picture and package ............................................................................................................................ 18 Document No.: WMB20170414 Page 3 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 1. Overview Linkplay Wi-Fi Audio module - A88, is our 3rd generation smart audio modules developed to be used in the connected speaker, sound bar and other connected audio devices. It integrates the low power Broadcom BCM43455 Wi-Fi/BT chip and Amlogic A111 application processor. A111 is an advanced application processor designed for connected audio applications. It integrates a powerful CPU subsystem, advanced multi-format audio processing unit, a secured running environment and all major peripherals to form the low power audio AP. The main system CPU is a quad-core ARM Cortex-A5 CPU with 32KB L1 instruction and 32KB data cache for each core and a large 512KB L2 unified cache to improve system performance. Each Cortex-A5 CPU can run up to 1.5GHz and has a wide bus connecting to the memory sub-system. The main CPU handles all operating system, networking and user-interface related tasks. The audio processing engine (APE) is based on ARM NEONTM general-purpose SIMD architecture which works seamlessly with main CPU to accelerate the multimedia processing algorithms, enhancing the user experience. It is able to decode all major audio formats up to 192KHz high resolution including MP3, AAC, WMA, RM, FLAC, OGG, etc and with the flexibility to support future audio standards. A111 also integrates all standard audio input/output interfaces including I2S, PCM and S/PDIF audio input/output for different applications. A88 module supports IEEE 802.11 a/b/g/n/ac 2.4GHz and 5GHz. It also supports BT4.2 with EDR and BLE. A88 module also provides USB, I2S, I2C, PWM, SPI, UART etc. interfaces. The firmware is fully compatible with Apple AirPlay and digital living network alliance (DLNA) streaming standards. It supports Hi-Fi audio up to 192KHz, 24-bit with most popular audio formats. It supports multi-room and multi-channel audio streaming with perfect synchronization. With this module, you can play the music on your speaker wirelessly from iPhone, iPad , iPod touch, Android devices or PC. More important, it enables the traditional speaker system to become the Internet enabled device through the wired or wireless connection provided by the module. Thus, you could freely playback any Internet audio contents such as music, podcast, radio or either the accompany audio in the movie directly from the Internet. Feature Support IEEE 802.11 a/b/g/n/ac 1x1 antenna diversity Wi-Fi dual band Support BT4.2 with EDR and BLE Application Connected speaker, sound bar Connected audio devices 1.1. Key Components List No. 1 2 3 4 Type Main SoC DRAM FLASH Wi-Fi/BT Description Brand A111 LFBGA 12x12mm 306-ball 0.65 ball pitch RoHS DDR3 H5TQ1G63EFR-PBC FBGA96 SMD RoHS SLC TC58NVG0S3HTA00 TSOP I 48 SMD RoHS AP6355SD 2.4G/5G DUAL BAND BT4.2 with EDR and BLE AMPAK Amlogic SKHynix TOSHIBA Document No.: WMB20170414 Page 4 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 5 6 7 POWER IC POWER IC RESET IC DC-DC SY8089AAAC SOT23-5 RoHS DC-DC SY8088AAC SOT23-5 RoHS SGM809-RXN3L/TR SOT-23 RoHS SILERGY SILERGY SGMICRO 1.2. Parameter Type Wi-Fi Items Certification WLAN Standard Frequency Range Number of Channels Modulation Output Power SISO Receive Sensitivity
(11b,20MHz) @8% PER Wi-Fi (2.4G) SISO Receive Sensitivity
(11g,20MHz) @10% PER Receive Sensitivity
(11n,20MHz) @10% PER Maximum Input Level Antenna Reference Wi-Fi (5G) WLAN Standard Performance FCC/CE/Wi-Fi Alliance IEEE 802.11 a/b/g/n/ac Wi-Fi compliant 2.400 GHz ~ 2.483 GHz (2.4 GHz ISM Band) Ch1 ~ Ch13 802.11b : DQPSK, DBPSK, CCK 802.11 g/n : OFDM /64-QAM,16-QAM, QPSK, BPSK 802.11b /11Mbps : 16 dBm 1.5 dB @ EVM-9dB 802.11g /54Mbps : 15 dBm 1.5 dB @ EVM-25dB 802.11n /MCS7@HT20 : 14 dBm 1.5 dB @ EVM
-27dB
- 1Mbps PER @ -96 dBm, 2 dB
- 2Mbps PER @ -90 dBm, 2 dB
- 5.5Mbps PER @ -88 dBm, 2 dB
- 11Mbps PER @ -86 dBm, 2 dB
- 6Mbps PER @ -90 dBm, 2 dB
- 9Mbps PER @ -88 dBm, 2 dB
- 12Mbps PER @ -87 dBm, 2 dB
- 18Mbps PER @ -85 dBm, 2 dB
- 24Mbps PER @ -83 dBm, 2 dB
- 36Mbps PER @ -80 dBm, 2 dB
- 48Mbps PER @ -76 dBm, 2 dB
- 54Mbps PER @ -73 dBm, 2 dB
- MCS=0 PER @ -89 dBm, 2 dB
- MCS=1 PER @ -85 dBm, 2 dB
- MCS=2 PER @ -84 dBm, 2 dB
- MCS=3 PER @ -80 dBm, 2 dB
- MCS=4 PER @ -77 dBm, 2 dB
- MCS=5 PER @ -75 dBm, 2 dB
- MCS=6 PER @ -72 dBm, 2 dB
- MCS=7 PER @ -70 dBm, 2 dB 802.11b : -10 dBm 802.11g/n : -20 dBm External: I-PEX, Small antennas with 0~2 dBi peak gain IEEE 802.11a/n 2x2, Wi-Fi compliant Document No.: WMB20170414 Page 5 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 Frequency Range Number of Channels Modulation Output Power 4.900 GHz ~ 5.845 GHz (5.0 GHz ISM Band) Please see the following table 802.11a : OFDM /64-QAM,16-QAM, QPSK, BPSK 802.11n : OFDM /64-QAM,16-QAM, QPSK, BPSK 802.11ac : OFDM /256-QAM 802.11a /64-QAM(R=3/4) : 14 dBm 2 dB @ EVM
-25dB 802.11n /64-QAM(R=5/6) : 13 dBm 2 dB @ EVM
-27dB 802.11ac/256-QAM(R=3/4) : 12 dBm 2 dB @ EVM
-30dB 802.11ac/256-QAM(R=5/6) : 10 dBm 2 dB @ EVM
-32dB SISO Receive Sensitivity
(11a,20MHz) @10% PER SISO Receive Sensitivity
(11n,20MHz) @10% PER Receive Sensitivity
(11n,40MHz) @10% PER Receive Sensitivity
(11ac,20MHz) @10% PER
- 6Mbps PER @ -90 dBm, 2 dB
- 9Mbps PER @ -88 dBm, 2 dB
- 12Mbps PER @ -87 dBm, 2 dB
- 18Mbps PER @ -85 dBm, 2 dB
- 24Mbps PER @ -81 dBm, 2 dB
- 36Mbps PER @ -78 dBm, 2 dB
- 48Mbps PER @ -73 dBm, 2 dB
- 54Mbps PER @ -72 dBm, 2 dB
- MCS=0 PER @ -89 dBm, 2 dB
- MCS=1 PER @ -87 dBm, 2 dB
- MCS=2 PER @ -84 dBm, 2 dB
- MCS=3 PER @ -81 dBm, 2 dB
- MCS=4 PER @ -77 dBm, 2 dB
- MCS=5 PER @ -73 dBm, 2 dB
- MCS=6 PER @ -71 dBm, 2 dB
- MCS=7 PER @ -70 dBm, 2 dB
- MCS=0 PER @ -87 dBm, 2 dB
- MCS=1 PER @ -84 dBm, 2 dB
- MCS=2 PER @ -82 dBm, 2 dB
- MCS=3 PER @ -78 dBm, 2 dB
- MCS=4 PER @ -75 dBm, 2 dB
- MCS=5 PER @ -70 dBm, 2 dB
- MCS=6 PER @ -69 dBm, 2 dB
- MCS=7 PER @ -67 dBm, 2 dB
- MCS=0 PER @ -88 dBm, 2 dB
- MCS=1 PER @ -86 dBm, 2 dB
- MCS=2 PER @ -83 dBm, 2 dB
- MCS=3 PER @ -80 dBm, 2 dB Document No.: WMB20170414 Page 6 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5
- MCS=4 PER @ -76dBm, 2 dB
- MCS=5 PER @ -72 dBm, 2 dB
- MCS=6 PER @ -70 dBm, 2 dB
- MCS=7 PER @ -69 dBm, 2 dB
- MCS=8 PER @ -65 dBm, 2 dB
- MCS=0 PER @ -86 dBm, 2 dB
- MCS=1 PER @ -82 dBm, 2 dB
- MCS=2 PER @ -80 dBm, 2 dB
- MCS=3 PER @ -77 dBm, 2 dB
- MCS=4 PER @ -74 dBm, 2 dB
- MCS=5 PER @ -69 dBm, 2 dB
- MCS=6 PER @ -67 dBm, 2 dB
- MCS=7 PER @ -65 dBm, 2 dB
- MCS=8 PER @ -63 dBm, 2 dB
- MCS=9 PER @ -62 dBm, 2 dB
- MCS=0 PER @ -82 dBm, 2 dB
- MCS=1 PER @ -79 dBm, 2 dB
- MCS=2 PER @ -77 dBm, 2 dB
- MCS=3 PER @ -73 dBm, 2 dB
- MCS=4 PER @ -70 dBm, 2 dB
- MCS=5 PER @ -68 dBm, 2 dB
- MCS=6 PER @ -64 dBm, 2 dB
- MCS=7 PER @ -62 dBm, 2 dB
- MCS=8 PER @ -59 dBm, 2 dB
- MCS=9 PER @ -58 dBm, 2 dB 802.11a/n : -30 dBm External: I-PEX, Small antennas with 0~2 dBi peak gain BQB Bluetooth V4.2 of 1, 2 and 3 Mbps External: I-PEX, Small antennas with 0~2 dBi peak gain 2402 MHz ~ 2480 MHz 79 channels FHSS, GFSK, DPSK, DQPSK 10 dBm (Max.)
-86 dBm, typical
-86 dBm, typical
-80 dBm, typical Receive Sensitivity
(11ac,40MHz) @10% PER Receive Sensitivity
(11ac,80MHz) @10% PER Maximum Input Level Antenna Reference Certification Bluetooth Standard Antenna Reference Frequency Band Number of Channels Modulation Output Power
(Output power can be configured by HCD firmware) Sensitivity @ BER=0.1%
for GFSK (1Mbps) Sensitivity @ BER=0.01%
for /4-DQPSK (2Mbps) Sensitivity @ BER=0.01%
Bluetooth Document No.: WMB20170414 Page 7 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 for 8DPSK (3Mbps) Maximum Input Level Work voltage Work current Standby current Operating ambient temperature Storage temperature Wi-Fi work distance IO Extension Dimension GFSK (1Mbps): -20dBm
/4-DQPSK (2Mbps) : -20dBm 8DPSK (3Mbps) : -20dBm 3.5-5.5V 200 ~ 240mA (STA mode) 5mA 0 ~ 70
-40 ~ 85 2.4G 80 meters/5G 150meters USB, I2S, I2C, PWM, SPI, UART NGFF golden finger 67PIN Table1-1 Linkplay A88 module parameters Hardware 5GHz(20MHz) Channel table Band (GHz) Operating Channel Numbers Channel Center Frequencies(MHz) 5.15GHz~5.25GHz 5.725GHz~5.845GHz 36 40 44 48 149 153 157 161 165 5180 5200 5220 5240 5745 5765 5785 5805 5825 Document No.: WMB20170414 Page 8 of 19 Doc Title Linkplay WiFiAudio-A88 Specification 2. Hardware Description 2.1. Description of Hardware Interface Number Version WMB20170414 1.5 A88 provides the option to connect with customer board through its 67-pins NGFF golden finger. The detail is as follows. Figure 2-1 A88 interface pins Document No.: WMB20170414 Page 9 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Pin description:
Number Version WMB20170414 1.5 Pin Name Type Function0 Function1 Pin No. 135 1623 2527 2834 4650 5354 5863 6474 75 GND Supply Digital ground 246 VDD_5V 2643 4852 5662 NC Power I Power supply input > 500mA No connection 7 17 19 21 29 31 33 35 37 39 41 45 47 49 51 55 57 59 61 65 67 69 71 73 18 20 GPIO1 GPIO3 GPIO_M GPIO_SD NC GPIOY_9 GPIOY_10 GPIOY_11 GPIOY_12 GPIOY_13 GPIOY_14 PWM2 PWM3 I2C1_SCL I2C1_SDA SPI_MISO SPI_MOSI SPI_CLK SPI_CS USB1_VBUS USB1_DN USB1_DP
+5V USB_ID UART0_TXD UART0_RXD I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I/O I I/O I/O N/A I O I General purpose input output General purpose input output General purpose input output General purpose input output No connection General purpose input output General purpose input output General purpose input output General purpose input output General purpose input output General purpose input output PWM PWM I2C bus clock I2C bus data SPI bus MISO SPI bus MOSI SPI bus clock SPI bus chip select USB OTG bus power USB data minus USB data plus NC OTG ID signal UART0 transmit UART0 receive General purpose input output General purpose input output General purpose input output General purpose input output General purpose input output General purpose input output General purpose input output General purpose input output Debug use only Document No.: WMB20170414 Page 10 of 19 Doc Title Linkplay WiFiAudio-A88 Specification 22 24 30 32 36 38 40 42 44 60 66 68 70 72 TW1_SCL TW1_SDA UART1_TXD UART1_RXD JTAG_TMS JTAG_TDI JTAG_TDO JTAG_TCLK JTAG_TRST I2S_DI1 I2S_DO1 I2S_MCLK I2S_BCLK I2S_LRCLK I/O I/O O I NC NC NC NC NC I O O I/O O I2C bus clock I2C bus data UART1 transmit UART1 receive No connection No connection No connection No connection No connection I2S data in I2S data out I2S master clock I2S bit clock I2S L/R clock Number Version WMB20170414 1.5 General purpose input output General purpose input output Test use only Table 2-1 Linkplay A88 module pin description IInput Notes:
1. 2. OOutput 3. PPower 4. PUInternal Pull Up 5. PDInternal Pull Down 2.2. Mechanical Dimension Linkplay A98 module has the dimension of 58.5mm x 41.7mm. The detailed layout will be given shortly below. PCB thickness is 0.8mm, must match with NGFF female connector. Unit: mm PLUG PCB dimensions:
NGFF connector dimensions:
Document No.: WMB20170414 Page 11 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 Top View TOP Components High Limit Document No.: WMB20170414 Page 12 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 Bottom Components High Limit Figure 2-2: Linkplay A88 physical dimension 2.3. External Antenna A88 uses the external antenna for the best Wi-Fi performance. To use external antenna, please choose the antenna type that meets the requirement of IEEE 802 a/b/g/n/ac Wi-Fi standard running at 2.4GHz/5GHz frequency. The detailed parameters are shown in the table below. Document No.: WMB20170414 Page 13 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 Item Frequency range Impedance VSWR Reflection loss Connector Parameter 2.4 ~ 2.5GHz/4.9 ~ 5.8GHz 50 Ohm 2 (Max.) 1.43 dBi (@2.4~2.5GHz) 2.77 dBi (@5.15 ~ 5.85 GHz) I-PEX or populate directly Table 2-5 External antenna parameters for A88 2.4. Typical Application WiFiAudio-A88s typical reference design:
DAC Far-Field Document No.: WMB20170414 Page 14 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 Power Document No.: WMB20170414 Page 15 of 19 Doc Title Linkplay WiFiAudio-A88 Specification 2.5. Power on Sequence Number Version WMB20170414 1.5 2.6 USB OTG Port Please follow the design rule below to populate the USB host interface:
Item Signal Group Topology Reference Plane Characteristic Trace Impedance (Zo) Trace Width Serpentine Spacing (center to center) Parameter USB Differential Pair Point-to-Point Ground Referenced 90 10%
4 mils 8.5 mils Document No.: WMB20170414 Page 16 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 Minimum Isolation Spacing to Clock Signals Minimum Isolation Spacing to Low-Speed Signals Minimum Isolation Spacing to other USB Pair Total Length (with package length) Maximum Recommended Via Count DM to DP Length Matching (with package length) Match total length to within 10 mils 50 mils 20 mils 20 mils
< 8000 mils 2 (per side) Table 2-2 A88 USB design rule 3. Software Introduction 3.1. Feature list Easy Setup to setup your network, with the help of one button of your device, you can connect the device to your home router quickly. Music stream protocol Support Spotify Connect, Airplay, DLNA and QPlay protocol Amazon Alexa Music content Support iHeartRadio, Napster/Rhapsody, Tidal, Deezer, vTune, Qobuz, Audible, Radio.de, NPRXimalaya Qingting FM, QQ FM, Douban FM inside, with the help of App, you can search, stream, playback and preset the musics of the above music services. Multiroom Support multiroom. Support Airplay, Spotify, Bluetooth, Aux-in multiroom playback. Music format HTTP/HTTPS/RTSP/MMS/TS protocol HLS/ASX/M3U playlist format MP3/AAC/FLAC/ALAC/WMA/APE/OGG codec BT Support 4.2A2DP, AVRCP, HFP, HID profiles Support BLE Support EDR Preset With the help of App, you can store the music account token and playlist in the A88. Then the end user can play the playlist by the button/voice or timer even without the App. 3.2. APP support iOS App Document No.: WMB20170414 Page 17 of 19 Doc Title Linkplay WiFiAudio-A88 Specification iOS6.1suggest iOS10 and above Android APP Android 4.3.3 Quick Customization Number Version WMB20170414 1.5 With the help of the Linkplay compile server, you can change the brand and some strings, change the logo and some pictures to get a customization App. 3.3. Certifications Linkplay can help you to finish follow certifications:
Wi-Fi Logo BQB Amazon Alexa MFI DLNA QPlay Spotify Connect 4. Module picture and package 1A88 module picture Notes:
Linkplay: Linkplay logo A88: Module No. V04: MP version of A88 module 2Delivery Document No.: WMB20170414 Page 18 of 19 Doc Title Linkplay WiFiAudio-A88 Specification Number Version WMB20170414 1.5 Notes One tray = 100pcs One carton = 5 trays On carton in total: 5*100pcs = 500pcs Document No.: WMB20170414 Page 19 of 19 FCC Statement This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired operation. Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. The modular can be installed or integrated in mobile or fix devices only. This modular cannot be installed in any portable device. FCC Radiation Exposure Statement This modular complies with FCC RF radiation exposure limits set forth for an uncontrolled environment. This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter. This modular must be installed and operated with a minimum distance of 20 cm between the radiator and user body. If the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following:
Contains Transmitter Module FCC ID: 2ANOG-A88 Or ContainsFCC ID: 2ANOG-A88 When the module is installed inside another device, the user manual of the host must contain below warning statements;
1. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference.
(2) This device must accept any interference received, including interference that may cause undesired operation. 2. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. The devices must be installed and used in strict accordance with the manufacturer's instructions as described in the user documentation that comes with the product. Any company of the host device which install this modular with Single modular approval should perform the test of radiated emission and spurious emission according to FCC requirement, Only if the test result comply with FCC equirement, then the host can be sold legally. IC statement This device complies with Industry Canadas licence-exempt RSSs. Operation is subject to the following two conditions:
(1) This device may not cause interference; and
(2) This device must accept any interference, including interference that may cause undesired operation of the device. Cet appareil est conforme aux CNR exemptes de licence d'Industrie Canada . Son fonctionnement est soumis aux deux conditions suivantes :
( 1 ) Ce dispositif ne peut causer d'interfrences ; etc
( 2 ) Ce dispositif doit accepter toute interfrence , y compris les interfrences qui peuvent causer un mauvais fonctionnement de l'appareil. A separation distance of at least 20 cm is maintained between the transmitter's radiating structure(s) and the body of the user or nearby persons. Une distance de sparation d'au moins 20 cm est maintenue entre l'metteur rayonnant structure (s) et le corps de l'utilisateur ou des personnes proximit. For a host manufacture's using a certified modular, if (1) the module's IC number is not visible when installed in the host, or (2) if the host is marketed so that end users do not have straightforward commonly used methods for access to remove the module so that the IC number of the module is visible; then an additional permanent label referring to the enclosed module:
"Contains Transmitter Module IC: " 23153-A88 " or "Contains IC: 23153-A88" must be used. Warning:
This radio transmitter [ISED: 23153-A88] has been approved by Innovation, Science and Economic Development Canada to operate with the antenna types listed below, with the maximum permissible gain indicated. Antenna types not included that have a gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device.